Quick reaction synthesis type high temperature atmosphere stove and method for synthesizing ceramic powder

Abstract

The invention relates to a method to synthesize high-temperature atmosphere furnace and ceramic powder in the way of rapid reaction. A water-cooled flange provided with a water-cooled intermediate separator board at the middle part divides an atmosphere furnace into a high temperature atmosphere furnace and a cold chamber furnace. The high temperature atmosphere furnace is provided with a horizontal heating chamber which is installed on the hearth and which consists of insulation material and heating elements. The heating elements are uniformly distributed on the upper and lower surfaces of the internal walls of the insulation material and connected with the copper electrode installed on the high temperature atmosphere furnace through leads; a heat insulation valve is mounted on the surface of the horizontal heating chamber facing the cold chamber furnace, wherein a fixed track is mounted in the heat insulation valve; the movable track in the cold chamber furnace is connected with thelower push rod in the push rod mechanism, wherein the movable track is provided with a hopper onside, and the hopper is connected with the upper push rod of the push rod mechanism; every furnace is provided with an air inlet and an air outlet with a valve, a vacuum hole and a thermocouple, etc. The invention not only realizes the rapid heating of the materials and the rapid synthesis of the atmosphere, but also realizes the rapid cooling of the products and the even growth of the crystal.

Description

technical field [0001] The invention belongs to the technical field of ceramic powder preparation, and in particular relates to a rapid-reaction synthesis high-temperature atmosphere furnace and a method for synthesizing ceramic powder. Background technique [0002] At present, in the field of ceramic powder preparation, according to the different states of starting materials, it is divided into liquid phase method, gas phase method and solid phase method. [0003] The liquid phase method also includes co-precipitation method, sol-gel method, microemulsion method and hydrothermal method, etc., and is a common method for preparing various nano-ceramic powders such as oxides, nitrides and carbides. The essence of the liquid phase method is to replace the raw materials that are not controlled by geometry and chemistry in the traditional process with source substances whose properties are controlled at the microscopic level. ingredients, to make a variety of nanopowders with un...

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Problems solved by technology

At present, some conventional vacuum heating furnaces cannot meet the requirements of multi-process operation in one vacuum furnace.

[0006] For example, Li Minzhong's invention patent CN1352375A, a resistance heating ultra-high temperature vacuum sintering furnace, is an equipment that meets the ultra-high temperature sintering process of reaction sintered silicon carbide products. Similarly, the utility model patent CN2391155Y of Tong Shuiguang et al. provides a device consisting of a vacuum unit, a sealed furnace body, a furnace and a heater. The furnace body can realize the processing requirements of rapid cooling and rapid heating, but The heating device of the furnace body is an external heat burner, which is placed on the side of the furnace and connected to the furnace through the combustion homogenization chamber. In this way, impurities will inevitably be brought into the reactants and products during the process of burning heat. middle

Therefore, the existing conventional furnace body cannot realize the rapid heating of materials and the rapid cooling of products while taking into account the accurate control of air flow and pressure in the heating zone, etc., which are required for the preparation of various ceramic powders.

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